Chapman was placed on the 10-day injured list due to left elbow inflammation Saturday, retroactive to Aug. 6.
Chapman had picked up saves in each of his last six outings, but he apparently developed an elbow issue. It's not yet clear whether he'll be forced to spend more than the minimum of 10 days on the injured list, but Chad Green and Jonathan Loaisiga will likely be in consideration for ninth-inning duties while Chapman is sidelined.